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Melting Winter Chapter 10. Magma Generation Partial melting –Upper mantle –Deep crust Magma density Less than surroundings.

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Presentation on theme: "Melting Winter Chapter 10. Magma Generation Partial melting –Upper mantle –Deep crust Magma density Less than surroundings."— Presentation transcript:

1 Melting Winter Chapter 10

2 Magma Generation Partial melting –Upper mantle –Deep crust Magma density Less than surroundings

3 MASH Hilderth and Moorbath (1988) Refer to processes that take place beneath continental crust in subduction zones Melting Assimilation Storage Homogenization

4 Ab-An System Melts are enriched in Na & Si Residual is enriched in Ca & Al

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6 Di-An System Initial melts have eutectic composition Residual enriched in end-member composition

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8 Fo-Q System Initial melts have eutectic or peritectic composition Residual rock is enriched in Fo or Q, depending on the starting composition

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